jennapi,
You should try booting into Recovery mode again and clearing the cache. If you still get an error then I'd suggest performing a Factory Reset, particularly if you haven't done one since receiving an OTA update.
Be sure to back up any important information - you can use the Kies software on your PC to backup your contacts, SMS/MMS, call logs, pictures/videos, etc.
If you want to backup your apps and app data you can try the Google solution (in Settings -> Back up and reset, check the box that says "Back up my data" ) or you can try a proven solution like Helium:
http://market.android.com/details?id...ikdutta.backup
Sent from my rooted, debloated, deodexed Sinclair ZX-80 running CM 10.2 using Tapatalk 4